20526345 has 96 divisors (see below), whose sum is σ = 44323200. Its totient is φ = 8975232.

The previous prime is 20526329. The next prime is 20526347. The reversal of 20526345 is 54362502.

20526345 is a `hidden beast` number, since 20 + 5 + 2 + 634 + 5 = 666.

It is not a de Polignac number, because 20526345 - 2⁴ = 20526329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20526347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 191782 + ... + 191888.

It is an arithmetic number, because the mean of its divisors is an integer number (461700).

Almost surely, 2^20526345 is an apocalyptic number.

It is an amenable number.

20526345 is an abundant number, since it is smaller than the sum of its proper divisors (23796855).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20526345 is a wasteful number, since it uses less digits than its factorization.

20526345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 20526345 is about 4530.6009535160. The cubic root of 20526345 is about 273.8023731658.

Adding to 20526345 its reverse (54362502), we get a palindrome (74888847).

The spelling of 20526345 in words is "twenty million, five hundred twenty-six thousand, three hundred forty-five".